The Michigan Daily story of April 15, 2012 has an excellent set of photos of MLK's visit to Ann Arbor on November 5, 1962, and the story of how they were discovered.
David Erdody, a digital curator at the Bentley Historical Library, discovered a series of 20 photo negatives in early January that feature King giving a speech and hosting a discussion at the University. These photographs, which have never been printed or published, depict King speaking and greeting a crowd at Hill Auditorium, attending a small discussion in the Michigan Union and having dinner at the University on Nov. 5, 1962.
One of the main archives of MLK materials is at Boston University; there's a set of correspondence with the University of Michigan Office of Religious Affairs that would be worth looking at to round out some of the institutional memory of this event.
